我正在尝试设计一个非常简单的界面，它显示了许多图像，然后是评级按钮。这是XAML。
<Window x:Class="ASU_Evaluation2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local ="clr-namespace:ASU_Evaluation2"
Title="MainWindow" Height="686" Width="1154" Loaded="Window_Loaded" Closing="Window_Closing">
<Grid Name="ReviewData" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200*"/>
<ColumnDefinition Width="205"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="474*" />
<RowDefinition Height="25*" />
</Grid.RowDefinitions>
<StackPanel Grid.Column="1" Grid.RowSpan="2">
<ToggleButton Content="Cell is good" Name="tbGoodCell" Height="30" Margin="1,1" IsChecked="{Binding Cell_Good}" Width="200"/>
<ToggleButton Content="Recon is good" Name="tbReconGood" Height="30" Margin="1,1" IsChecked="{Binding Recon_Good}" Width="200"/>
<ToggleButton Content="Stain is good" Name="tbStainCell" Height="30" Margin="1,1" IsChecked="{Binding GoodStain}" Width="200"/>
<ToggleButton Content="Recon Clipped" Name="tbReconClipped" Height="30" Margin="1,1" IsChecked="{Binding Clipping}" Width="200"/>
<ToggleButton Content="Interesting" Name="tbInteresting" Height="30" Margin="1,1" IsChecked="{Binding Interesting}" Width="200"/>
<ToggleButton Content="Background Noise" Name="tbNoisy" Height="30" Margin="1,1" IsChecked="{Binding Noisy}" Width="200"/>
<ToggleButton Content="Has Rings" Name="tbRings" Height="30" Margin="1,1" IsChecked="{Binding Rings}" Width="200"/>
<Label Content="Interfering Object" Margin="1,10,1,1"></Label>
<ListBox Name="tbInterferingObject" Height="70" SelectedIndex="{Binding InterferingObject}" Width="200">
<ListBoxItem>None </ListBoxItem>
<ListBoxItem>Close </ListBoxItem>
<ListBoxItem>Far </ListBoxItem>
<ListBoxItem>Side </ListBoxItem>
</ListBox>
<Label Content="Comments"/>
<TextBox Margin="1,5" Height="400" Name="Comments" Text="{Binding Comments}" Width="200"/>
</StackPanel>
<ComboBox Grid.Row="2" Grid.Column="0" x:Name="themes" Width="150" Height="20" SelectionChanged="themes_SelectionChanged" SelectedIndex="0" />
<TabControl Grid.Column="0" Name="tabControl1" >
<TabItem Header="Recon View" Name="tabItem1">
<Grid Height="612" Width="934">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="225" />
<ColumnDefinition Width="225" />
<ColumnDefinition Width="225" />
<ColumnDefinition Width="225*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="291" />
<RowDefinition Height="291" />
</Grid.RowDefinitions>
<Image Grid.Column="0" Grid.Row="0" Margin="2,2" Name="MIP_Image" Height="210" Width="210"/>
<Image Grid.Column="1" Grid.Row="0" Margin="2,2" Name="Axial_Image" Source="{Binding Axial_Image}" Height="210" Width="210"/>
<Image Grid.Column="0" Grid.Row="1" Margin="2,2" Name="Sag_Image" Source="{Binding Sag_Image}" Height="210" Width="210"/>
<Image Grid.Column="1" Grid.Row="1" Margin="2,2" Name="Z_Image" Source="{Binding Z_Image}" Height="210" Width="210"/>
<Image Grid.Column="2" Grid.Row="0" Margin="2,2" Name="Fly_Through" Height="210" Width="210"/>
<Image Grid.Column="2" Grid.Row="1" Grid.ColumnSpan="2" Margin="2,2" Name="Background" Source="{Binding Background}" Height="250" Width="450"/>
</Grid>
</TabItem>
<TabItem Header="Alignment View" Name="tabItem2">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="460" />
<ColumnDefinition Width="460" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="190" />
<RowDefinition Height="190" />
<RowDefinition Height="190" />
</Grid.RowDefinitions>
<Image Grid.Column="0" Grid.Row="0" Margin="2,2" Name="PP1" Source="{Binding PP1}" Width="460" Height="190" />
<Image Grid.Column="0" Grid.Row="1" Margin="2,2" Name="PP2" Source="{Binding PP2}" Width="460" Height="190" />
<Image Grid.Column="0" Grid.Row="2" Margin="2,2" Name="PP3" Source="{Binding PP3}" Width="460" Height="190" />
<Image Grid.Column="1" Grid.Row="0" Grid.RowSpan="3" Margin="2,2" Name="Centering" HorizontalAlignment="Center" VerticalAlignment="Center" Width="400" MinHeight="400" Source="{Binding Centering}"/>
</Grid>
</TabItem>
<TabItem Header="Stack View" Name="tabItem3" GotFocus="tabItem3_GotFocus">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="418*" />
<RowDefinition Height="24*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="581*" />
<ColumnDefinition Width="207*" />
</Grid.ColumnDefinitions>
<Image Name="Stack_Image" VerticalAlignment="Center" HorizontalAlignment="Center" MinHeight="100" MinWidth="100" Height="400" Margin="98,26,82,15" Width="400" />
<ScrollBar Grid.Column="1" Height="353" HorizontalAlignment="Left" Margin="36,50,0,0" Name="StackZPosition" VerticalAlignment="Top" Width="17" ValueChanged="StackZPosition_ValueChanged" />
<Label Content="Z Position" Grid.Column="1" Height="27" HorizontalAlignment="Left" Margin="13,17,0,0" Name="label1" VerticalAlignment="Top" Width="79" />
<ProgressBar Grid.Row="1" Height="14" HorizontalAlignment="Left" Margin="95,4,0,0" Name="StackProgress" VerticalAlignment="Top" Width="404" />
</Grid>
</TabItem>
<TabItem Header="Othogonal View" Name="tabItem4">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="418*" />
<RowDefinition Height="24*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="581*" />
<ColumnDefinition Width="207*" />
</Grid.ColumnDefinitions>
</Grid>
</TabItem>
</TabControl>
</Grid>
</Window>
绑定的类看起来像这样
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Threading.Tasks;
using System.Drawing;
namespace ASU_Evaluation2
{
class DatasetExample
{
public string Date { get { return "3/3/3"; } }
public ImageSource ExampleImage
{
get
{
string exampleImage = TopDirectory + @"\data\CrossSections_X___TIK.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public bool Recon_Succeeded { get { return true; } }
public bool Cell_Good
{
get;
set;
}
public bool Recon_Good
{
get;
set;
}
public string DatasetName { get; private set; }
public string TopDirectory { get; private set; }
string VGFolder;
string StorageFolder;
string DehydrateFolder;
string BackupFolder;
string StackFolder;
string StackReportFilePath;
private void BuildPaths()
{
string dirName = Path.GetFileNameWithoutExtension(TopDirectory);
//return dirName;
string[] parts = dirName.Split('_');
string Prefix = parts[0];
string Year = parts[1].Substring(0, 4);
string month = parts[1].Substring(4, 2);
string day = parts[1].Substring(6, 2);
VGFolder = Path.Combine(@"y:\", Prefix + "\\" + Year + month + "\\" + day + "\\" + dirName);
StorageFolder = Path.Combine(@"z:\", Prefix + "\\" + Year + month + "\\" + day + "\\" + dirName);
DehydrateFolder = Path.Combine(@"e:\", Prefix + "\\" + Year + month + "\\" + day + "\\" + dirName);
BackupFolder = Path.Combine(@"V:\BackupCompleted\", Prefix + "\\" + Year + month + "\\" + day + "\\" + dirName);
if (Prefix.ToLower() == "cct001")
{
StackFolder = Path.Combine(@"V:\Raw PP\cct001\Absorption\", Year + month + "\\" + day + "\\" + dirName + "\\STACK\\000");
}
else
StackFolder = Path.Combine(@"V:\Raw PP\", Prefix + "\\" + Year + month + "\\" + day + "\\" + dirName + "\\STACK\\000");
StackReportFilePath = VGFolder + "\\FixedStackReport.xml";
}
public DatasetExample(string name, string path)
{
DatasetName = name;
TopDirectory = path;
GoodStain = true;
Clipping = false;
Interesting = false;
Noisy = false;
Rings = false;
InterferingObject = 0;
Comments = " ";
Evaluator = "Brian";
Cell_Good = true;
CellType = " ";
Recon_Good = true;
}
public string Evaluator { get; set; }
public string CellType { get; set; }
public bool GoodStain { get; set; }
public bool Clipping { get; set; }
public bool Interesting { get; set; }
public bool Noisy { get; set; }
public bool Rings { get; set; }
public int InterferingObject { get; set; }
public string Comments { get; set; }
public ImageSource Axial_Image
{
get
{
string exampleImage = TopDirectory + @"\data\CrossSections_X___TIK.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public ImageSource Sag_Image
{
get
{
string exampleImage = TopDirectory + @"\data\CrossSections_Y___TIK.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public ImageSource Z_Image
{
get
{
string exampleImage = TopDirectory + @"\data\CrossSections_Z___TIK.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public void ClearMemory()
{
}
public ImageSource Background
{
get
{
string exampleImage = TopDirectory + @"\data\background.tif";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public ImageSource PP1
{
get
{
string exampleImage = TopDirectory + @"\data\projection1.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public ImageSource PP2
{
get
{
string exampleImage = TopDirectory + @"\data\projection2.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public ImageSource PP3
{
get
{
string exampleImage = TopDirectory + @"\data\projection3.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
public string Centering
{
get
{
string exampleImage = TopDirectory + @"\data\centering.avi";
if (File.Exists(exampleImage))
return exampleImage;
else
return "";
}
}
public ImageSource Stack_Image
{
get
{
string exampleImage = TopDirectory + @"\data\CrossSections_Y___TIK.jpg";
if (File.Exists(exampleImage))
return BitmapFrame.Create(new Uri(exampleImage, UriKind.Absolute), BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
else
return null;
}
}
}
}
在高端计算机上加载接口需要15-20秒。我试图用Windows SDK运行性能监视器工具，它只是崩溃了。我究竟做错了什么？这是winforms中一项令人尴尬的简单任务。
答案 0 :(得分：2)
首先，您的属性每次调用时都会返回ImageSource的新实例。你应该避免这种情况。
修复1：
private ImageSource sag_Image;
public ImageSource Sag_Image
{
get
{
if (sag_Image != null)
return sag_Image;
//... Etc your code
sag_Image = //Assign the backing field to use it later.
}
}
您应该Freeze your Freezables（例如ImageSource）。
修复2：
public ImageSource Sag_Image
{
get
{
if (sag_Image != null)
return sag_Image;
//... Etc your code
sag_Image = //Assign the backing field to use it later.
sag_Image.Freeze(); //Notice the Freeze() method.
}
}
修复3：
异步。所有需要10多毫秒才能完成应该的操作都是异步的。
第三，您的XAML看起来像是从Visual Studio设计器获得的，并且还有一些可疑的东西，例如ScrollBar.ValueChanged事件。那是做什么的？发布相关代码，可能是您需要的屏幕截图。我确信有一个正确的方法来做WPF，它不涉及可怕的代码隐藏winforms类型的黑客，并没有显示你在这里描述的这些性能问题。